Cement-coated nail



NITED STATES ATENT OFFICE.

IRA COPELAND, OF BROCKTON, MASSACHUSETTS.

CEMENT-COATED NAIL..

SPECIFICATION forming part of Letters Patent No. 362,940, dated May 17,1887.

Application tiled January 19, 1857. Serial No. 224,751.

To all whom it may concern.-

Be it known that I, IRA COPELAND, of Brockton, in the county of Plymouthand State of Massachusetts, have invented a new and useful Improvementin Nails, of which the following is afnll, clear, and exact description.

The primary object of this invention is to increase the tenacity orholding power of nails after being driven.

The invention consists in coating nails throughout their entire lengthwith certain viscous substances. These substances are so sensitive toheat that the coating of the nail is somewhat softened by the heatproduced in the act of driving the nail, and consequently the nail iscemented firmly into its socket when driven.

A secondary object of this invention is found in the preservative effectof the coating, both upon the nail and upon the substance into which thenail may have been driven, espeeially when used in localities subject todamp` ness.

Considering` both objects to be attained by this improvement, myexperience would indicate Trinidad asphalt as one of the best substancesavailable. It may be used in its natural condition or tempered by theaddition of parafline or some non-volatile oil-as, for instance, thercsiduuin from the distillation of petroleum-but there is a wide rangeof substances susceptible of use for the coating, embracingcoal-tar,asphalt,and other bituminous substances, various resins, gums,waxes, and their compounds.

To effeetually apply the coating material to the nai1,it is necessary tohave both the nail and the coating material heated to a temperature atleast high enough to melt the coating material.

(No model.)

I find that the wire nail gives much more satisfactory results than thecut nail; but the latter may also be used.

Vhen the nail is driven, the coating material is somewhat displaced fromthe foremost portion ot' the nail, and a part ofthe coating graduallyaccumulates near the outer portion ofthe socket in driving, sothat whenthe head is sunk into its socket it is embedded in a layer of coatingmaterial. A sufficient amount of coating material remains adhering alongthe shaft ofthe nail, gradually increasing in thickness from the pointtoward the bead, to irmly unite the shaft ofthe nail to thesubstanceinto which it is driven.

In the drawings, Figure l represents a perA spective of the nail; Fig.2, a section of the nail; Fig. 3, a section to show the action ot' thedriven nail.

I am aware that metal-coated nails, or nails coated with any substancewhich forms au integral part ol' the nail itself, so that when driventhe coating maintainsits position relative to the principal substanceoi' the nail, are not new. The coating of my nail is in some degreeplastic and is in some degree removed from its original position inheilig driven.

Vhat I claim, and desire to secure by`Letters Patent, is-

A cement-coated nail, substantially as and for the purpose set forth.

In testimony whereof Iv have signed my name to this specitication, inthe presence of two snbscribi ng witnesses, this 12th day ol'Jan u ary,A. D. N57.

IRA COPELANI).

XVitnesses:

Lucius R. CHURCHILL, NVARREN A. REED.

